update generated validation UX and AID integration flow

Improve generated validation behavior and backend error mapping so UI shows user-friendly Russian messages, while keeping filtering/sorting and exporter updates aligned with current app generation flow.

server/src/common/filters/api-exception.filter.ts

@@ -0,0 +1,175 @@
+import {
+  ArgumentsHost,
+  BadRequestException,
+  Catch,
+  ExceptionFilter,
+  HttpException,
+  HttpStatus,
+  Logger,
+} from '@nestjs/common';
+import { Prisma } from '@prisma/client';
+import { Request, Response } from 'express';
+
+type ErrorResponseBody = {
+  statusCode: number;
+  message: string;
+  code: string;
+  details?: unknown;
+  path: string;
+  timestamp: string;
+};
+
+@Catch()
+export class ApiExceptionFilter implements ExceptionFilter {
+  private readonly logger = new Logger(ApiExceptionFilter.name);
+
+  catch(exception: unknown, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+    const request = ctx.getRequest<Request>();
+
+    const mapped = this.mapException(exception);
+    const body: ErrorResponseBody = {
+      statusCode: mapped.statusCode,
+      message: mapped.message,
+      code: mapped.code,
+      ...(mapped.details !== undefined ? { details: mapped.details } : {}),
+      path: request.url,
+      timestamp: new Date().toISOString(),
+    };
+
+    if (mapped.statusCode >= 500) {
+      this.logger.error(
+        `Unhandled error on ${request.method} ${request.url}: ${mapped.message}`,
+        exception instanceof Error ? exception.stack : undefined,
+      );
+    }
+
+    response.status(mapped.statusCode).json(body);
+  }
+
+  private mapException(exception: unknown): {
+    statusCode: number;
+    message: string;
+    code: string;
+    details?: unknown;
+  } {
+    if (exception instanceof HttpException) {
+      const statusCode = exception.getStatus();
+      const payload = exception.getResponse() as
+        | string
+        | {
+            message?: string | string[];
+            error?: string;
+            code?: string;
+            details?: unknown;
+          };
+
+      if (typeof payload === 'string') {
+        return {
+          statusCode,
+          message: payload,
+          code: `HTTP_${statusCode}`,
+        };
+      }
+
+      const rawMessage = payload?.message ?? exception.message;
+      const message = Array.isArray(rawMessage)
+        ? rawMessage.join(', ')
+        : rawMessage || exception.message;
+
+      return {
+        statusCode,
+        message,
+        code: payload?.code ?? payload?.error ?? `HTTP_${statusCode}`,
+        details: payload?.details,
+      };
+    }
+
+    if (exception instanceof Prisma.PrismaClientKnownRequestError) {
+      return this.mapPrismaKnownRequestError(exception);
+    }
+
+    if (exception instanceof Prisma.PrismaClientValidationError) {
+      return {
+        statusCode: HttpStatus.BAD_REQUEST,
+        message:
+          'Некорректные данные запроса. Проверьте обязательные поля и форматы значений.',
+        code: 'PRISMA_VALIDATION_ERROR',
+      };
+    }
+
+    if (exception instanceof Prisma.PrismaClientInitializationError) {
+      return {
+        statusCode: HttpStatus.SERVICE_UNAVAILABLE,
+        message: 'Сервис базы данных временно недоступен.',
+        code: 'DATABASE_UNAVAILABLE',
+      };
+    }
+
+    if (exception instanceof Prisma.PrismaClientRustPanicError) {
+      return {
+        statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
+        message: 'Внутренняя ошибка сервера.',
+        code: 'DATABASE_ENGINE_PANIC',
+      };
+    }
+
+    if (exception instanceof Error) {
+      return {
+        statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
+        message: exception.message || 'Internal server error',
+        code: 'INTERNAL_ERROR',
+      };
+    }
+
+    return {
+      statusCode: HttpStatus.INTERNAL_SERVER_ERROR,
+      message: 'Internal server error',
+      code: 'INTERNAL_ERROR',
+    };
+  }
+
+  private mapPrismaKnownRequestError(
+    exception: Prisma.PrismaClientKnownRequestError,
+  ) {
+    switch (exception.code) {
+      case 'P2002': {
+        const target = Array.isArray(exception.meta?.target)
+          ? exception.meta?.target.join(', ')
+          : String(exception.meta?.target ?? '');
+        return {
+          statusCode: HttpStatus.CONFLICT,
+          message: target
+            ? `Запись с таким значением уже существует (${target}).`
+            : 'Запись с таким значением уже существует.',
+          code: 'UNIQUE_CONSTRAINT_VIOLATION',
+          details: exception.meta,
+        };
+      }
+      case 'P2003':
+        return {
+          statusCode: HttpStatus.CONFLICT,
+          message:
+            'Операцию нельзя выполнить из-за связанных данных или некорректной ссылки.',
+          code: 'FOREIGN_KEY_CONSTRAINT_VIOLATION',
+          details: exception.meta,
+        };
+      case 'P2025':
+        return {
+          statusCode: HttpStatus.NOT_FOUND,
+          message: 'Запись не найдена.',
+          code: 'RECORD_NOT_FOUND',
+          details: exception.meta,
+        };
+      default:
+        return {
+          statusCode: HttpStatus.BAD_REQUEST,
+          message: 'Ошибка при обработке данных в базе.',
+          code: exception.code,
+          details: exception.meta,
+        };
+    }
+  }
+}
+